Bathroom sink drains allow water to flow out of the sink basin into the p-trap and ultimately to the sewer. Sink drains can be matched to faucet finish and can come with a stopper or grid drain. Some drains also connect to a pull stopper or a push stopper on the faucet. Basket strainers are also available with some sink drains. The bathroom sink drain is not only important for looks but to maintain a good water flow from your sink. Consider drains from brands like Kohler, Danze, and American Standard.